Psychology 2550A/B Lecture Notes - Lecture 5: Twin Study, False Dilemma, Interpersonal Attraction

• School: Western University
• Department: Psychology
• Course: Psychology 2550A/B
• Professor: David Vollick

Document Summary

Twin studies also found a substantial genetic influence on traditionalism- a conservative (as opposed to liberal) Tesser (1993)- attitudes which are more heritable are harder to change and more i(cid:373)porta(cid:374)t i(cid:374) deter(cid:373)i(cid:374)i(cid:374)g the perso(cid:374)"s judge(cid:373)e(cid:374)ts of i(cid:374)terperso(cid:374)al attra(cid:272)tio(cid:374) Twin studies suggest that patterns in romantic love are almost completely due to the environment- particularly in the family and essentially unaffected by genetic influences. Twin studies by johnson and colleagues found however that the tendency to get married is genetically influenced. Some of the similarity between identical twins on self-report measures may reflect similarities in how they report. But researchers found that peer ratings correlated . 55 with self-report ratings on big. An observational study of mz and dz twins found that genetics also account for appro(cid:454)i(cid:373)atel(cid:455) 25% of if the(cid:374) (cid:271)eha(cid:448)ioral sig(cid:374)atures. Heritability index (n) = percentage of variation that is attributable to genetic factors. N for each personality variable is: n = [ correlation (mz) correlation (dz)] x2.